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Dell‘Aquila, D.; Lombardo, I.; Verde, G.; Vigilante, M.; Acosta, L.; Agodi, C.; Cappuzzello, F.; Carbone, D.; Cavallaro, M.; Cherubini, S.; Cvetinovic, A.; D‘Agata, G.; Francalanza, L.; Guardo, G.L.; Gulino, M.; Indelicato, I.; La Cognata, M.; Lamia, L.; Ordine, A.; Pizzone, R.G.; Puglia, S.M.R.; Rapisarda, G.G.; Romano, S.; Santagati, G.; Spartà, R.; Spadaccini, G.; Spitaleri, C.; Tumino, A.
EPJ Web of conferences, 2018, Letnik: 184Journal Article
The αdecay path of the Hoyle state in 12 C (E x = 7:654MeV) represents one ofthe most challenging questions of modern nuclear physics. Its knowledge can help in theunderstanding of cluster configurations in light nuclei and the possible existence of Bose-Einstein condensates in nuclei. In stars, it is involved in the so-called 3αprocess, wherethe 12 C nucleosynthesis occurs. We studied the 14 N(d; α2) 12 C(7:654) reaction at 10:5MeVincident energy to probe its direct decay component. We found, with a precision higherof a factor 5 than any other previous experiment, an almost total absence of direct decaysby-passing the ground state of 8 Be. From our analysis, a new upper limit of such decayis found at 0:043% (95% C.L.). Astrophysical 3α process reaction rate calculations haveto be accordingly revised.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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